Wood heel concaving machine



Dec. 1, 1931. J. c. SHAMBOW WOOD HEEL CONCAVING MACHINE Filed April 14.1930 2 Sheets-Sheet Dec. -1, 1931. J. c. SHAMBOW 1,834,075

WOOD HEEL CONCAVING MACHINE Fil ed April 14, 1930 2 Sheets-Sheet 2 42'48 III I 44 Patented Dec. 1, 1931 -JOHN, G. SHAM.BOW,.. or SALEM. NEWmsamnj assxenon 1..0' mam SHOE are:

GHINERY coRroRATIom JERSEY 1 Application filed A ril; 1-4,

placed upside down. on the table and pushed and turned. over thecutterby hand. The

movement of the heel blank at the point of cut is sidewise of thecutter, and the edge of the attaching face. of theblank is kept againstthe gage directly; opposite the cutter. In order to prevent dragging theblank out of the operators fingers the cutter rotates toward thc gage,,,thus tending to push the blank toward the gage and to crowd it. down onthe table. 7

This has resulted in the spoiling of much Work due to the cutter tearingout pieces of the narrow thin rim of the attaching surface, which passesover the slot, past the cutter, without adequate support. Thisdifiiculty is inci-eased by the fact that the grain of the Wood, runslongitudinally in; a. heel blank, and little pieces of the rim are. veryeasily split off.

A principal obj ectof the presentinvention is to avoid this difliculty.To this end I have provided a supporting plate closely surrounding theoperative portion of the cutter, to

support the rim at points immediately adj acent to the cutter teeth.This guard plate is Y made of material, preferably such as fiber orbrass, which is rigid but substantially softer than the cutter, and ismovable along the work table so that the cutter can cut its own way intoit and secure a perfect fit between the cutter and the guard plate,irrespective of the shape of cutter being used for the particular workin hand.

In accordance with a feature of the invention the guard plate is locatedin a groove in the top of the work table and is held therein gage.

QE IP-ATERSON, mastic A 'eonroaerlonfor NEW wool). new. coNoAvme MACHINEin operative position the gage. It. is

steadied. in its movementtoward the cutter, when being set to. fit a newcutter, by the This results in a. simple and easily operable.construction;

I have also provided a convenient and efiiecient means. of adjusting thetable. It, is necessary toiuse cutters of varying diameters,

and tohave the cutters project above thetable by different amounts incase of different, kinds of work. Therefore, in the illustrated machine,I have provided a. vertical adjusb. mentiforthe table, and have combinedthere-. with a, pivotal adjustment about a hori'zontalw axis (both(if-these adjustments being rela-J tively to the cutter) so that thetable can al-.-

ways he placed: at a. convenient'angle. for'the operatorand at the sametime. attheproper heightrelatively-tothe cutter.

These and other featiu'es of the inven tion; comprising certaincombinations and arrangements of parts will be. apparent from" thefollowingdescription. of a preferred embodimentofv the invention shown:in the-- drawings..-.

Fig.- 1 chine; Fig. 2"is a transverse section perpendicular" to; the.-axis. of. the. cutter;

igz. 3 is asection on the line III III of 1g. 2; Figs. Ir-to. 8.- .aredetails. showing successive stages of the operation ofconcav-ing a'heelblank;- V

Figs. 9 and 10 illustrate heel blanks before and after concavlng,respectively.

7 Themain: frame 10 isprovided with aveh ticalslidewaya 12in whichslidesa; block 14.: The block 14 is adjustable in the slidewayby a;screwlfi, with a lock nut; 18, and has a slot 20through which a collaredclamp screw" 22 projects into the main frame, tohold it 5.6-- curely inadjusted position.

' The slide 14 carries atits. top a frame 24: on which is pivoted atable 26 on a. horizontal axis 28. The tableis angularly adjustableabout the axis. 28 by a screw 30. of finer thread than, the screw 16,.with a lock nut 32. The upper end of the screw 30 bears against thelower side of the table 26.

is a perspect veview of the ma! The table 26 has a slot 34 in'it throughwhich projects a rotary cutter 36, which is mounted on the shaft of amotor 38. The plane of axis 28. The frame 24 is slotted for the shaft,as shown at 39 in Fig. 2.

The table 26 has a groove 40' in its top (Figs. 1 and 3) extending fromits edge into warduand from the cutter 36. When the gage member44 isclamped down to the table 26, it'binds the plate 42 firmly in place. The

edge of the gage is perpendicular to the plane of the cutter. I

Whena new cutter is mounted in the ma-Y chine, the table 26 is adjustedto proper position by the screws 16 and 30. The adjustment is securedroughly by the screw 16 and thefiner screw 30 easily secures the exactamount of projection desired for the cutter. Thus, the table 26 canalways be kept onthe angle that is convenient for the operator.-

,The gage 44 is then loosened enough to permit the plate 42 to. move,and this plate is pushed into-the cutter until the cutter has cut a.notch into it-of substantial depth. The

gage is then adjusted to proper gaging posi- -tion tosecure the properwidth of rim on the. attaching face of the heel blank, and clampedinplace by'the devices at 48.

-The operatorthen takes a heel blank 52, as shown in Fig.9, invhis'fingers and places it on the table with its breastsurfacesubstant-ially parallel to the plane of the cutter and its edgeagainst the gage. He then pushes and turns itsuccessively through thepositions shown in Figs. 4 to 8,: and removes it from the machine, itthen having the appearance shown in ig. 10 at 54.

.- .-'The plate 42 can be pushed in by a'follow- 'ingplate of the samecharacter, as it is cut away by successive adjustments, and used up toits last inch or so. It supports the edge of the heel block immediatelyadjacent to the ends ofthe cutter teeth and prevents tearing out anyportion of the heel blank rim by the cutter." 1

Having described my invention, what I claim as'new and desire to secureby Letters Patent-of the United States is:

1. In a wood heel concavingmachine, a work table, a rotary concavingcutter, and

a guardplate carried by the table, said platebeingmade of. a rigidmaterial easily cut byv the cutter, and being also movable onthe tabletoward the cutter to permit the cutter to cut a slotin the guard plateclosely surround- 1 ing the effective portion of the cutter.

the cutter is perpendicular to the 42 is laid in this'groove and fits 2.In a wood heel concaving machine, a work table, a rotary cutter, a guardplate mounted on the upper surface of the table and having a notch inits end closely surrounding the operative portion of the cutter,

' and an adjustable gage mounted on the table and arranged to clamp-theguard plate in operative position when fastened in gaging position.

. 3. In Lwood' heel concaving machine, a

'work table having a slot e-Xtendingt-hrough it, a rotary cutterprojecting through the "slot, a guardnlate mounted on the uppersurfaceof the table and having a notch in its end closely surroundingthe operative portionv o'f thecuttenandan adjustable gage mounted onthetable and arranged to clamp the guard plate in operative positionwhen fastened in gagingposition; f

4.In awood heel concaving machine, a work table having a slot' extendingthrough it, .a rotary cutter projecting through the slot, the tablehaving also a groove in its upper surface extending into the slot, a.guard plate in the groove, with anotch in its end surrounding theoperative portion of the cutter,.the thickness of the guard plate beinggreater than the depth of the groove, a gage member resting on the guardplate adjacent to the cutter, and means for fastening the gageme-mber totlie't-able.v a

In: a wood heel .concaving machine, a worktable having aslot extendingthrough it, a rotary cutter projecting through the slot, the tablehaving alsoa'groove inits upper surface extending into the slot, a guardplate in the'groove, the guard plate being made of a rigid materialsubstantially softer than the cutter, so-that the guard plate may bepushed along the groove into engagement with the cutter to form a notchin the/end of the guard plate cl'osely'surrounding the operative portionof the cutter, and a gage member adjustablymounted'on the table abovethe guard plate and arranged to clamp the guard plate in position as thegage member is fastened in adjusted position.

In testimony whereof I have signed my name to} this-specification.

- JOHN 0,; sHAMBow.

